Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / core / init.c

diff --git a/qemu/roms/ipxe/src/core/init.c b/qemu/roms/ipxe/src/core/init.c
new file mode 100644 (file)
index 0000000..7ea0730
--- /dev/null
+++ b/qemu/roms/ipxe/src/core/init.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <ipxe/device.h>
+#include <ipxe/console.h>
+#include <ipxe/init.h>
+
+/** @file
+ *
+ * Initialisation, startup and shutdown routines
+ *
+ */
+
+/** "startup() has been called" flag */
+static int started = 0;
+
+/**
+ * Initialise iPXE
+ *
+ * This function performs the one-time-only and irreversible
+ * initialisation steps, such as initialising the heap.  It must be
+ * called before (almost) any other function.
+ *
+ * There is, by definition, no counterpart to this function on the
+ * shutdown path.
+ */
+void initialise ( void ) {
+       struct init_fn *init_fn;
+
+       /* Call registered initialisation functions */
+       for_each_table_entry ( init_fn, INIT_FNS )
+               init_fn->initialise ();
+}
+
+/**
+ * Start up iPXE
+ *
+ * This function performs the repeatable initialisation steps, such as
+ * probing devices.  You may call startup() and shutdown() multiple
+ * times (as is done via the PXE API when PXENV_START_UNDI is used).
+ */
+void startup ( void ) {
+       struct startup_fn *startup_fn;
+
+       if ( started )
+               return;
+
+       /* Call registered startup functions */
+       for_each_table_entry ( startup_fn, STARTUP_FNS ) {
+               if ( startup_fn->startup )
+                       startup_fn->startup();
+       }
+
+       started = 1;
+}
+
+/**
+ * Shut down iPXE
+ *
+ * @v flags            Shutdown behaviour flags
+ *
+ * This function reverses the actions of startup(), and leaves iPXE in
+ * a state ready to be removed from memory.  You may call startup()
+ * again after calling shutdown().
+ *
+ * Call this function only once, before either exiting main() or
+ * starting up a non-returnable image.
+ */
+void shutdown ( int flags ) {
+       struct startup_fn *startup_fn;
+
+       if ( ! started )
+               return;
+
+       /* Call registered shutdown functions (in reverse order) */
+       for_each_table_entry_reverse ( startup_fn, STARTUP_FNS ) {
+               if ( startup_fn->shutdown )
+                       startup_fn->shutdown ( flags );
+       }
+
+       /* Reset console */
+       console_reset();
+
+       started = 0;
+}